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Is composite pure aluminum related to pinholes?
Time: 2014-05-09 Source: Cutting Edge of Packaging Read: 10646 times
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Wenzhou Junchuan Machinery Equipment Co., Ltd.
Yueyang Jiali Xiaochen: Is composite pure aluminum related to pinholes? The phenomenon of translucent rubber appears. Why does film pull appear when PET / PET is compounded twice?
Ashland Liao Xinzheng: Penetration is related to pinholes.
A soft package: Kangda 8116 can solve it.
Yueyang Jiali Xiaochen: PET / PET will obviously hear the sound of brushing when compounding, how to solve this?
Ashland Liao Xinzheng: This is because PET has high surface tension and strong adhesion to the adhesive. When the adhesive is separated from PET, the drawing sound is easy to occur. The higher the speed, the more obvious. You can consider using low-viscosity glue or lowering the temperature of the coating roller, but generally there is no drawing noise that will not affect the appearance.
Yueyang Jiali Xiaochen: Why does PET / VMPET slip during rewinding? No matter how you control tension?
Fuller glue Zhang Shixiang: What is the amount of glue?
Ashland Liao Xinzheng: Does PET // VMPET slip or slip when the two layers are combined with PE?
Shanghai Kangda Liu Juntao: The sizing amount is too large.
Yue Yang Jiali Xiaochen: I have tried 1.2 ~ 1.8g / m2 glue amount, it will still be like this.
Solvent-free compound-glow: The heat-sealing temperature is too high, there is no cooling roller, and the winding tension is too large. This problem occurs.
Sichuan-Li: It is recommended to adjust the taper to try, the tensile strength of two-layer PET is too large.
Shanghai Kangda Liu Juntao: It is recommended to increase the initial tension of rewinding and adjust the taper.
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